Continuity and Change D.4 Cell & Nuclear Division (id: 0d3f2f157)

本题目来源于试卷: Continuity and Change D.4 Cell & Nuclear Division，类别为 IB生物学

[单选题]
The photomicrograph showskcce rl 7k87i p)z 8+(syzu3qj a pollen grain from L. can *xxr4b2 3+ongans eh9didum (Lily). Which stage of meiosis is showxn2 ex3 hsbano4 9*+grn?

A. Telophase I
B. Anaphase I
C. Telophase II
D. Anaphase II


参考答案:  D


本题详细解析:

Meiosis produces four daughter cells from one parent cell over two cell divisions, during anaphase II the sister chromatids are being pulled to either pole of the cell (Choice D).

Choice A is incorrect as during Telophase I, homologous chromosomes are pulled to either pole of the cell, producing two new cells. Choice B is incorrect because during Anaphase I, homologous chromosomes are beginning to be pulled to either pole of the cell leading to formation of two new cells. Choice C is incorrect as during Telophase II, sister chromatids (now chromosomes in own right) are at each pole of the cell, the chromosomes are unwinding, the spindle is disassembling and the nuclear envelopes are forming, resulting in the formation of 4 haploid cells.

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